combi microwave 2900w on switch fuse or 16a supply?

[vde-electrician]

when installing circuits protected my mcb's , i have always used the 80% rule. eg a lighting circuits where the load won't exceed 80% of the mcb rating.

i have a combi microwave. max 2900 watts . 2900/230 = 12.6 Amps. does 80% apply to cartridge fuses? i guess this could be classed as a continuous load as the microwave oven may be on for long lengths of time.

16a circuit with dp pole switch and outlet seems the best plan?

cheers

 

[MJPD29]

3kw for me is dedicated circuit. 2.9 is close enough to that to warrant it. I’d agree with your plan.

 

[littlespark]

A microwave isn’t on for long lengths of time.
That’s the point of a microwave.

Being a combi, it might be on for longer… but not at its full 2900W for all the time.

What does the MI say out of curiosity?